A STUDY ON THE AGE AND GROWTH OF THE HAIRTAIL IN THE PO HAI AND HUANG HAI

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 作者 单位 洪秀云 辽宁省海洋水产研究所

本文报道了渤、黄海带鱼年龄与生长关系的研究结果。此项研究工作所用的材料采自北纬33°-39°30′,东经119°-125°30′海域机帆拖网、机轮拖网及架子网的渔获物。根据耳石年轮测定年龄,测定鱼的体长和体重,确定生长情况。研究结果表明,渤、黄海带鱼的体长（L）与耳石半径（R）的关系符合于幂函数曲线:L=36.84R1.5951。其生长适合于方程:Lt=L[1-e-K]（t-tn）],计算求得L=501mm,K=0.438,t0=-0.0607;同时也适合于方程:Wt=W[1-e-K（t-t0）]1,计算求得W=1592克,拐点的位置为t=2.32,Wt=471,约相当于0.232W处。渤黄海带鱼体重（W）与体长（L）的关系可用下式表示:W=3.339×10-5L2.3443。带耳石边缘各月增长率（I）,按I=（R-rn）/(rn-rn-1)计算结果为一年一个周期,自4月起升高,12月达最高峰,此时的I值为0.6—0.7。1—3月大部分出现窄带轮纹,I值锐降至0及0.15。文内以窄带称为年轮,年轮主要在1-3月形成。

There are 983 and 1200 hairtail fish (Trichiurus haumela Forskal) used respectivelyfor age analysis and for composition analrsis. Samples were taken in Po Hai and HuangHai in 1962--1963. The results are summarized as follows: 1) The hairtail fish in Po Hai and Huang hai grow rapidly in the same year theyhatched. The body length reaches 72mm about two months after hatching, and at thelength of 190mm the annulus begins to form. Therefore the first annulus obsreved canbe considered as the first true annulus. 2) The relationship between body length (L) and distance of the annulus from thenueleus (R) on the otolith is conformed with the power function curve: L = 36. 84R(1. 595x) 3) The growth of the hairtail fish is as the following cquations: Lt = L[1 - e-K(t-t0))].where L = 501mm; K= 0.438; t_0 = - 0. 0607 Wt = W[1 -e(K(t-t0)]3.where W = 1592g; K= 0. 34; t = - 0.91 The coordinate of the inflexion point being at t = 2. 32 Wt = 471, corresponding to 0.232 W. 4) The Length (L) weight (W) relationship of the hairtail fish is expressed as fol-lows: W = 3. 339×10~(-6)L(2.8445) 5) It is certain that the monthly changes of the terminal index at each annulusgroup of the otolith form one cycle each year. The terminal margin of the opaque zone(narrow zone) is called the annulus and the formation of the annulus chiefly takes placefrom January to March.
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